Glutamine

L-Glutamine is the most abundant amino acid in the human body. Responsible for the metabolism of protein, supplementing with glutamine may help to minimize the breakdown of muscle after training, while also acting as an anti-catabolic agent. Glutamine is an especially popular amino acid among athletes looking to shed unwanted body fat, as it increases your ability to naturally produce Human Growth Hormone which, in turn, helps to metabolise body fat and enhance new muscle growth.